Method of making wrenches



H. T. ROBERTS. METHOD QF MAKING WRENCHES. APPLICATION FILED `MAYZI.1919.

@were for' HENRY T. ROBERTS, 0F NEW YORK, N. Y.

METHOD 0F MAKING WRENCHES.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed May 21, 1919.' Serial No. 298,612.

To all whom t may concern:

Be it known that I, HENRY T. ROBERTS, a citizen of the United States,residing at 35 lVarren street, New York city, in the county of New Yorkand State of New York, have invented a ynew and useful Method of MakingWrenches, of which the following is a specification.

My object is to provide for the produc tion, at the minimum expense, ofa novely and simple form of wrench of the flat-sided type the parts ofwhich cannot become acc1- dentally disconnected.

Referring to the accompanying drawing Figure 1 is a viewoin sideelevation of a wrench constructed in accordance with my invention. Fig.2 is a similar view of the two parts forming the handle-portion andstationary jaw of the wrench, before being united. Fig. 3 is aperspective view of the sliding jaw of the wrench; and Fig. 4, a similarview of the nut employed for shifting the sliding jaw along the shank ofthe wrench, Figs. 3 and 4 being shown slightly enlarged.

In the production of a wrench in accordance with my invention, as Iprefer to practise it, l provide the shank portion 5 formed of a fiatbar of suitable metal, as for example steel, of uniform width, on whichI cut a thread at one end, the threads being at opposite edges of thebar, as indicated at 6. The part thus provided forms the handle portionof the wrench and is suitably shaped to serve this purpose. Thestationary jaw of the wrench, this jaw being represented at 7, is formedof a piece of fiat metal, such as steel, preferably having a neckportion 8 at which this jaw is secured in endwise abutting relation tothe threaded end of the handle portion 5 as shown, as by electricallywelding these parts together. The sliding j aw of the wrench is reresented at 9 and is preferably formed wit a bifurcated portionpresenting arms 1() spaced apart and apertured as represented at 11, atwhich apertures the jaw surrounds the threaded part 6 of the handle bar5 and is movable along the latter, the arms 10 presenting an opening 12therebetween in which a nut 13 screwing upon the threads 6, is located,this nut serving as a means of adjusting the sliding jaw 9 along thehandle-portion 5 toward and away from the stationary aw 7.

In the formation of the wrench the sliding j aw 9with the nut 13positioned in the opening 12, is applied to the threaded end of thehandle-portion 5, the jaw 9 and nut 13 to surround this portion and thenut 13 to engage the threads 6 thereof, and the piece of metal formingthe stationary jaw 7 then welded in place against the extremity of thethreaded end of the bar-portion 57 as shown in Fig. 1.

The portion of the metal of the bar 5 at the end of its thread 6, thisportion being indicated at 14:, thus forms a stop which prevents the nut13 from unscrewing from the bar 5 at this end of the latter, and the jaw7 forms a stop vat the other end of the wrench for preventing the nutfrom unscrewing from the bar at this end thereof, the parts of thewrench thus being prevented from becoming disconnected even when roughlyhandled.

By providing the jaw 9 as shown with one side open between thearm-portions 10, it may be readily made by forging it to shape and thenpunching out, by means of the common punch-press, the openings forrereceiving the bar-portion 5, as distinguished from requiring drillingand machining to form the openings through the jaw 9 and thus this partof the wrench may be constructed very economically.

What I claim as new and desire to secure by Letters Patent is:

'1. The method of manufacturing wrenches of the flat-sided type, whichconsists in forming the shank of the wrench of a relatively thin flatbar with threads at its opposite edges throughout a portion only of saidbar, applying a sliding jaw to encir cling position on said bar andscrewing upon said threads a nut which engages said jaw for operatingit, and thereupon welding to the end of said bar opposite to thatforming the handle of the wrench, a relatively thin flat piece of metalforming a stationary j aw for cooperation with said sliding jaw.

2. The method of manufacturing wrenches of the flat-sided type, whichconsists in forming the shank of the wrench of a relatively thin flatbar with threads at its opposite edges throughout a portion only of saidbar, applying a sliding jaw to encircling position on said bar and a nutto said threads,

which engages said jaw for operating it,`

and thereupon welding to the end of said bar opposite to that formingthe handle of the wrench a relatively thin flat piece of metal forming astationary jaw for coperation With said sliding jaw.

3. The method of manufacturing Wrenches of the flat-sided type, Whichconsists in forming the shank of the Wrench of a relatively thin flatbar with threads at its opposite edges throughout a portion only of saidbar and presenting a stop surface at the end of said thread, applying asliding jaw to encircling position on said bar and a nut to 10 saidthreads, which engages said jaw for operating it, and thereupon Weldingto the end of said bar opposite to that forming the handle of theWrench, a relatively flat piece of metal forming a stationary jaw for co15 operation With said sliding jaw.

HENRY T. RoBERTS.

